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    SIGNIFICANT OVEREXPRESSION OF DVL1 IN TAIWANESE COLORECTAL C

    發布時間:2016-10-24 ??? 閱讀數:

     Significant Overexpression of DVL1 in Taiwanese Colorectal Cancer Patients with Liver Metastasis

     
    Ming-Yii Huang 1,2,3, Li-Chen Yen 4, Hsueh-Chiao Liu 5, Po-Ping Liu 6, Fu-Yen Chung 4,
    Tsu-Nai Wang 7, Jaw-Yuan Wang 3,8,9,10,* and Shiu-Ru Lin 4,11,*
     
    Received: 1 August 2013; in revised form: 24 September 2013 / Accepted: 29 September 2013 /
    Published: 14 October 2013
     
    Abstract: Undetected micrometastasis plays a key role in the metastasis of cancer in colorectal cancer (CRC) patients. The aim of this study is to identify a biomarker of CRC patients with liver metastasis through the detection of circulating tumor cells (CTCs). Microarray and bioinformatics analysis of 10 CRC cancer tissue specimens compared with normal adjacent tissues revealed that 31 genes were up-regulated (gene expression ratio of cancer tissue to paired normal tissue > 2) in the cancer patients. We used a weighted enzymatic chip array (WEnCA) including 31 prognosis-related genes to investigate CTCs in 214 postoperative stage I–III CRC patients and to analyze the correlation between gene expression and clinico-pathological parameters. We employed the immunohistochemistry (IHC) method with polyclonal mouse antibody against DVL1 to detect DVL1 expression in 60 CRC patients. CRC liver metastasis occurred in 19.16% (41/214) of the patients. Using univariate analysis and multivariate proportional hazards regression analysis, we found that DVL1 mRNA overexpression had a significant, independent predictive value for liver metastasis in CRC patients (OR: 5.764; 95% CI: 2.588–12.837; p < 0.0001 on univariate analysis; OR: 3.768; 95% CI: 1.469–9.665; p = 0.006 on multivariate analysis). IHC staining of the immunoreactivity of DVL1 showed that DVL1 was localized in the cytoplasm of
    CRC cells. High expression of DVL1 was observed in 55% (33/60) of CRC tumor specimens and was associated significantly with tumor depth, perineural invasion and liver metastasis status (all p < 0.05). Our experimental results demonstrated that DVL1 is significantly overexpressed in CRC patients with liver metastasis, leading us to conclude that DVL1 could be a potential prognostic and predictive marker for CRC patients.
     
    Keywords: colorectal cancer; liver metastasis; DVL1 overexpression; weighted enzymatic chip array (WEnCA); immunohistochemistry (IHC)

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